KEV · Actively exploited

CVE-2009-0556

CVE-2009-0556 is actively exploited (CISA KEV catalog) : high severity (CVSS 8.8), 2 tracked apps concerned, none still exposed on their current version.

Severity (CVSS): 8.8
Exploitation: Confirmed
Tracked apps: 2
Still exposed: 0

Published on 2009-04-03

Microsoft Office PowerPoint 2000 SP3, 2002 SP3, and 2003 SP3, and PowerPoint in Microsoft Office 2004 for Mac, allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an an invalid index value that triggers memory corruption, as exploited in the wild in April 2009 by Exploit:Win32/Apptom.gen, aka "Memory Corruption Vulnerability."

Attack vector : Network No privileges required

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS 67.31% predictive model; CISA confirms active exploitation percentile 99.3%

CISA Known Exploited Vulnerability

Added to KEV: 2026-01-07
Remediation deadline: 2026-01-28
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Ransomware: Unknown (not documented by CISA)

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Microsoft PowerPoint macOS com.microsoft.Powerpoint

Affected - Fixed in - Latest tracked 16.114 undetermined
Office Windows winget:Microsoft.Office

Affected - Fixed in - Latest tracked - undetermined

Vulnerable CPE configurations (6)

Vendor	Product	Platform	Versions	CPE 2.3 URI
microsoft	powerpoint All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:microsoft:powerpoint:2000:sp3::::::
microsoft	powerpoint All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:microsoft:powerpoint:2000:sp3::::::
microsoft	powerpoint All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:microsoft:powerpoint:2002:sp3::::::
microsoft	powerpoint All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:microsoft:powerpoint:2002:sp3::::::
microsoft	powerpoint All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:microsoft:powerpoint:2003:sp3::::::
microsoft	powerpoint All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:microsoft:powerpoint:2003:sp3::::::

View on NVD ↗ CISA KEV catalog ↗ Advisory · www.microsoft.com Advisory · blogs.technet.com Advisory · secunia.com

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